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   "source": [
    "import numpy as np\r\n",
    "import matplotlib.pyplot as plt\r\n",
    "import pandas as pd\r\n",
    "\r\n",
    "from sklearn.model_selection import train_test_split  # 这里是引用了交叉验证\r\n",
    "from sklearn.linear_model import LinearRegression  # 线性回归"
   ],
   "outputs": [],
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    "collapsed": true
   }
  }
 ],
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